Raiola: Players know dangers of NFL

Detroit Lions center Dominic Raiola says he expects to suffer from short-term memory loss when his career is over.

Raiola says NFL players know the condition is a hazard of their job. It's why the 11-year veteran says he couldn't justify suing the league for health problems as more than 1,000 former players have done.

Four ex-NFL players, including former Lions tackle Lomas Brown, sued the league Monday, saying it didn't properly protect them from concussions they blame for health problems. Their attorney says they suffer from memory loss, headaches, depression and other symptoms characteristic of those with traumatic brain injuries.

NFL spokesman Brian McCarthy has said any allegation that the league intentionally sought to mislead players is without merit.